Intermittent electron transfer activity from single CdSe/ZnS quantum dots

Abey Issac; Shengye Jin; Tianquan Lian

doi:10.1021/ja8043085

Intermittent electron transfer activity from single CdSe/ZnS quantum dots

J Am Chem Soc. 2008 Aug 27;130(34):11280-1. doi: 10.1021/ja8043085. Epub 2008 Aug 5.

Authors

Abey Issac¹, Shengye Jin, Tianquan Lian

Affiliation

¹ Department of Chemistry, Emory University, Atlanta, Georgia 30322, USA.

PMID: 18680292
DOI: 10.1021/ja8043085

Abstract

Electron transfer activity from excited single CdSe/ZnS core/shell quantum dots (QDs) to adsorbed Fluorescein 27 was studied by single QD fluorescence spectroscopy. In comparison with QDs, the QD-acceptor complexes showed a shorter average and broader distribution of QD emission lifetimes due to electron transfer to adsorbates. Large fluctuation of lifetimes in single QD/dye complexes was observed, indicating intermittent electron transfer activity from QDs.